he is just one of many threads involved in the benghazi attack. several other reports of individual being arrested in tunisia that may also have connections. for right now there's no confirmation as to what role he precisely played. nbc news, cairo. >> thank you for that. >>> another note on benghazi, secretary of state hillary clinton will testify before open hearings on the benghazi attack report. report expected to be released next week with the hearings following shortly thereafter. >>> developing now nbc news has confirmed nelson mandela is undergoing tests in a hospital. the spokesperson for former south african president says the tests have been planned for some time and are consistent with his age. the country's current president says mandela is doing fine and there is no cause for alarm. the 94-year-old was last admitted to the hospital in february. >>> new duelling arguments today in the fiscal cliff war of words. with just 24 days and counting, president obama and senator marco rubio in the republican address are racheting up the rhetor